
Samsung Galaxy Win
The latest firmware for Samsung Galaxy Win (GT-I8552) is I8552XXANJ1 with Jelly(Android Bean), released on April 4, 2015 for 2 regions (CSC). Every official firmware build for GT-I8552, newest first: one row per build with all regions (CSC) that received it.
The newest build, I8552XXANJ1, was released on April 4, 2015. No new build has appeared for 140 months, so regular updates for this model have most likely ended.
The latest build for GT-I8552, I8552XXANJ1, was released on April 4, 2015 (11 years ago).
GT-I8552 has had no new firmware for 140 months, so regular updates have most likely ended.
Yes, all firmware files for GT-I8552 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-I8552, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing GT-I8552.